Práticas de Informática

procs     memory            page            disk          faults      cpu
 r b w   swap  free  re  mf pi po fr de sr s0 s1 s2 s6   in   sy   cs us sy id
 0 0 0 133136 13400   0  66 14  0  0  0  0  1  7  1  0  194  650  124  3  3 94
 0 0 0 3557440 835184 0  22  1  0  0  0  0  0  1  0  0  164  155  151  0  2 98
 0 0 0 3557440 835184 0  77  0  0  0  0  0  9  7  1  0  213  287   79  0  9 90

    * What it means Procs (Processors)
          o r means number of runnable processes during the interval. It does not include processes waiting or in I/O.
          o b the number of processes that are blocked waiting for I/O or other event.
          o w is the number of processes that are swapped out. A non zero value means system was swapping. 
    * memory
          o swap is used swap space.
          o free is availabe free swap space.
    * Page
          o pi means 1 kb pages per second that have been paged in.
          o po means 1 kb pages per second that have been paged out.
          o de means that anticipated short term memory shortfall. 
    * disk
          o s0, s1, s2, s6 number of disk operations per second on each disk drive. 
    * faults
          o in
          o sy 
    * cpu
          o cs is .
          o us is percentage of total cpu time spent in user state.
          o sy is total cpu time spent in system state.
          o id is percentage of total CPU time that CPU is idle. 
   
size command will show text, data and stack in the executable file.
size a.out

50884 + 9544 + 27604 = 88032

 ps -el | more

 F S   UID   PID  PPID  C PRI NI     ADDR     SZ    WCHAN TTY         TIME COMD
 3 S     0     0     0  0   0 20        0      0   482f60 ?           3:11 schet
 3 S     0     2     0  0   0 20    30810   4096   4900e4 ?          10:08 vhanh
 1 S     0   159     1  0  28 20    3081c     56   fcbc5c ?           0:00 strer
 1 S     0  1408     1  0  28 20    30b21    104   fcbb14 syscon      0:00 gettl
 1 S     0   167     1  0  40 20    30893     52   47da28 ?           0:00 volid
 5 S     0   171     1  0  26 20    30835    528   48bc30 ?           0:17 vold
41 S     0   321     1  0  26 20    308b1    108   1b66b4 ?           0:00 ktlod
 1 S     0   517     1  0  40 20    30904    100   4831ec ?           0:00 x25nd
 1 S     0   560     1  0  40 20    30941     92   4831ec ?           0:00 netd
 1 S     0   459     1  0  26 20    3094e     72   48bc30 ?           0:02 trlod


    * what it means? F is a set of flags which indicates process's current state.
          o 0 means process has terminated.
          o 1 means it is system process and is always in memory.
          o 2 process is being traced by its parent process.
          o 4 process is being traced by its parent and has been stopped.
          o 8 process cannot be awakened by a signal.
          o 10 process is loaded into memory.
          o 20 process cannot be swapped. 
    * S letter indicating process state.
    * O process is currently running on the processor.
    * S The process is sleeping or waiting for an event to complete.
    * R process is runable.
    * I process is idle.
    * Z process is zombie, it has terminated but in process state.
    * T process has stopped because parent is tracing it.
    * X means process is waiting for more memory.
    * UID is the identification of user who created this process.
    * PID is process identification number.
    * PPID parent process identification number.
    * C is time spent by CPU on this process.
    * PRI is processe's scheduling priority: lower number indicate higher priority.
    * NI process's nice number, also for scheduling priority.
    * SZ is amount of virtual memory in pages required by process.
    * TTY is the terminal that started the process.
    * TIME is total time spent by CPU on process so far.
    * COMD is the actual command.

# posted by ointernetinho : 5:46 PM